// Potentially supported backends

// CPU archs
PER_ARCH(x64)         // a.k.a. AMD64/x86_64
PER_ARCH(arm64)       // a.k.a. Aarch64
PER_ARCH(js)          // Javascript

// GPU archs
PER_ARCH(cuda)        // NVIDIA CUDA
PER_ARCH(opencl)      // OpenCL
PER_ARCH(metal)       // Apple Metal
PER_ARCH(opengl)      // OpenGL Compute Shaders
PER_ARCH(dx)          // Microsoft DirectX
